32.
General conclusions
• Data centers responsible for about 1.3% of the
world’s electricity use in 2010 (2% for US)
• Absolute electricity use has been growing fast
but growth slowed 2005 to 2010
• Delivery of IT services growing faster than
electricity use (so electricity productivity is up!)
• The indirect productivity benefits of IT are likely
to be more important than direct electricity use.
32Copyright
Jonathan
G.
Koomey
2012

33.
Lessons for “in-house” IT
• IT system and component efficiency (like from low-power
SSDs and DRAM) matter
• “In-house” data centers facing challenges because of
– poor measurement and verification processes
– misplaced incentives
– competition from cloud and other providers
– pressure from the “C-level”
• IT becoming, less general purpose, more custom designed,
and closer to tasks (more mobile)
• CIOs moving from “keepers of systems” to “brokers of
information services”. Get ready!
33
Copyright
Jonathan
G.
Koomey
2012